If the placement you called doesn't exist, the default Placement will be displayed. Please find below how default Placement and paywall work:

Default Placement-

If you use `presentPresentationForPlacement` but `placementVendorId` is not set on the dashboard or null,

If the placement is not found, it will fall back to the default placement.

In your case, it would be HOME.

when calling a paywall, the app can either directly call the paywall id or the placement id (preferred).

Default Paywall-

About default on the paywall, when calling a paywall, the app can either directly call the paywall id or the Placement id (preferred). The default paywall is used when the application uses the paywall id that does not exist.